ISHS Acta Horticulturae 109: III International Symposium on Flower Bulbs
GROWTH AND DEVELOPMENT OF TULIP, CV 'APELDOORN', FROM PLANTING UNTIL EMERGENCE |
| Author: | M. Benschop |
| Abstract:
Under field conditions the growth and development of tulip cv 'Apeldoorn', size 9–10, was studied. Root growth was temperature dependent. Increase in dry weight of the roots stopped around emergence of the shoot. Total root weight per bulb was approximately 60% of the root dry weight in pot experiments. There was no close relation between the relative growth rate of the shoot and the soil temperature. Allometric functions between the length and the weight of the shoot and the foot (basal part of the flower stalk) showed 3 distinct periods. The duration of the periods 1 and 2 seemed to be influenced by soil temperatures below 2°C. The partion of the increase in dry weight between the foot and the rest of the shoot was not affected by the soil temperature. Nearly no increase in dry weight was observed in the daughterbulbs. Total loss in dry weight of the motherbulb, in the period from planting until emergence, was around 65%. | |
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